BST 1.25" Flat Field Eyepiece - 8mm
Availability: Please contact us for an update
Contiguous US Customers:
All items we sell ship for free within the Contiguous US. Shipping will be via the cheapest shipping method which will vary depending on the items in your order. During checkout, you may also be shown other optional faster shipping choices.
US Customers in Hawaii and Alaska:
Free shipping applies to almost all products. A few large telescopes and mounts are excluded from this free shipping offer. For these items, please contact us to obtain a shipping quote before you check out using the online shopping cart.
International Customers:
Free shipping does not apply to international orders. During check-out, you will be presented with several shipping choices and costs. However, the export of some items may be restricted outside the US due to size or manufacturer restrictions.
- Optical design includes 5 or 6 elements to nearly eliminate field curvature distortion
- Eliminates out of focus stars near the edge of the field of view
- Feature large eye lenses and generous eye relief - from 9.6mm-24.4mm
- Wide fields of view – from 53° to 65°
- Fully multi-coated with blackened edges on all lens elements
- 1.25” barrels and standard 1.25” filter threads
- Twist-up eyecups and dust caps included
Standard eyepieces provide sharp, pinpoint star images at the center of the field but as you look out toward the edges, stars often begin to get blurred and out of focus. Eliminating this distortion usually calls for expensive optical designs with additional lens elements to eliminate the field curvature. But these new BST eyepieces use a 5 or 6 element design that offers a flat field over the entire field of view at an attractive price.
Featuring large eye lenses, wide fields of view (from 53°-65°), and generous eye relief (from 9.6mm-24.4mm), these eyepieces are a pleasure to use. Fully multicoated lenses maximize light transmission and edge blackening of all lens elements ensures excellent contrast. Other features include safety recess grooves on the 1.25" barrels, standard 1.25" filter threads, and twist-up eyecups.
Please note: The cosmetic appearance/labeling of this item changes often and may not exactly match what's shown in the photos above. Hence, multiple eyepieces you order may not match others in that same order or previous ones you may have purchased.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Eyepiece Series | FF (Flat Field) |
| Focal Length | 8mm |
| Barrel Size | 1.25" (31.7mm) |
| Apparent Field of View (Mfg Specified) | 60° |
| Eye Relief (Designed) | 9.5mm |
| Filter Threads | Standard 1.25" Filter Thread (M28.5 x 0.6) |
| Coatings | Fully Multi-Coated |
| Lens Elements | 7 |
| Lens Groups | 4 |
| Blackened Lens Edges | Yes |
| Barrel Type | With safety undercut |
| Protective Plastic Storage Container | Yes - Free Agena Eyepiece Container |
| Protective Plastic Storage Container Size | Agena 42x60mm |
| Height (With Eyeguard Extended) | 2.00" (50.7mm) |
| Maximum Width | 1.45" (36.9mm) |
| End Caps | 2 |
| Eye Lens Diameter | 0.43" (11.0mm) |
| Field Stop Diameter | 9.6mm / 0.38" |
| Rubber Eye Guard | Yes |
| Weight | 2.6 oz (74 g) |
| Country of Manufacture | China |
| Hide Found a better Shipped Price on Frontend? | No |
- Optical design includes 5 or 6 elements to nearly eliminate field curvature distortion
- Eliminates out of focus stars near the edge of the field of view
- Feature large eye lenses and generous eye relief - from 9.6mm-24.4mm
- Wide fields of view – from 53° to 65°
- Fully multi-coated with blackened edges on all lens elements
- 1.25” barrels and standard 1.25” filter threads
- Twist-up eyecups and dust caps included
Standard eyepieces provide sharp, pinpoint star images at the center of the field but as you look out toward the edges, stars often begin to get blurred and out of focus. Eliminating this distortion usually calls for expensive optical designs with additional lens elements to eliminate the field curvature. But these new BST eyepieces use a 5 or 6 element design that offers a flat field over the entire field of view at an attractive price.
Featuring large eye lenses, wide fields of view (from 53°-65°), and generous eye relief (from 9.6mm-24.4mm), these eyepieces are a pleasure to use. Fully multicoated lenses maximize light transmission and edge blackening of all lens elements ensures excellent contrast. Other features include safety recess grooves on the 1.25" barrels, standard 1.25" filter threads, and twist-up eyecups.
Please note: The cosmetic appearance/labeling of this item changes often and may not exactly match what's shown in the photos above. Hence, multiple eyepieces you order may not match others in that same order or previous ones you may have purchased.
| Free Shipping Graphic | Free US Shipping |
|---|---|
| Eyepiece Series | FF (Flat Field) |
| Focal Length | 8mm |
| Barrel Size | 1.25" (31.7mm) |
| Apparent Field of View (Mfg Specified) | 60° |
| Eye Relief (Designed) | 9.5mm |
| Filter Threads | Standard 1.25" Filter Thread (M28.5 x 0.6) |
| Coatings | Fully Multi-Coated |
| Lens Elements | 7 |
| Lens Groups | 4 |
| Blackened Lens Edges | Yes |
| Barrel Type | With safety undercut |
| Protective Plastic Storage Container | Yes - Free Agena Eyepiece Container |
| Protective Plastic Storage Container Size | Agena 42x60mm |
| Height (With Eyeguard Extended) | 2.00" (50.7mm) |
| Maximum Width | 1.45" (36.9mm) |
| End Caps | 2 |
| Eye Lens Diameter | 0.43" (11.0mm) |
| Field Stop Diameter | 9.6mm / 0.38" |
| Rubber Eye Guard | Yes |
| Weight | 2.6 oz (74 g) |
| Country of Manufacture | China |
| Hide Found a better Shipped Price on Frontend? | No |